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HD 115399


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The Keck Aperture-masking Experiment: Near-Infrared Sizes of Dusty Wolf-Rayet Stars
We report the results of a high angular resolution near-infrared surveyof dusty Wolf-Rayet stars using the Keck I Telescope, including newmultiwavelength images of the pinwheel nebulae WR 98a, WR 104, and WR112. Angular sizes were measured for an additional eight dustyWolf-Rayet stars using aperture-masking interferometry, allowing us toprobe characteristic sizes down to ~20 mas (~40 AU for typical sources).With angular sizes and specific fluxes, we can directly measure thewavelength-dependent surface brightness and size relations for oursample. We discovered tight correlations of these properties within oursample that could not be explained by simple spherically symmetric dustshells or even the more realistic ``pinwheel nebula''(three-dimensional) radiative transfer model, when using Zubko's opticalconstants. While the tightly correlated surface brightness relations weuncovered offer compelling indirect evidence of a shared and distinctivedust shell geometry among our sample, long-baseline interferometersshould target the marginally resolved objects in our sample in order toconclusively establish the presence or absence of the putativeunderlying colliding-wind binaries thought to produce the dust shellsaround WC Wolf-Rayet stars.

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观测天体数据

星座:半人馬座
右阿森松:13h18m05.47s
赤纬:-60°23'50.2"
视星:7.508
距离:272.48 天文距离
右阿森松适当运动:-20.5
赤纬适当运动:0.9
B-T magnitude:9.691
V-T magnitude:7.689

目录:
适当名称   (Edit)
HD 1989HD 115399
TYCHO-2 2000TYC 8990-2057-1
USNO-A2.0USNO-A2 0225-16555040
HIPHIP 64894

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